package net.lshimokawa.pap6;

public class Calculadora {

	public final int sumar(int a, int b) {
		return a + b;
	}

	public final int restar(int a, int b) {
		return a - b;
	}

	public final int multiplicar(int a, int b) {
		return a * b;
	}

	public final int dividir(int a, int b) {
	    if ( b==0) { 
                return -1;
            }
            return a / b;
	}
}
